Universal key is this for real

I always have heard if somebody has a key from a car of any brand for example toyota if I have the key of this car can I open another car from the same model with my key any answer is welcome thank you.

No,every model Toyota or any other car company makes has it's own key,every car is made differently,so no it's not possible.

no you cant the only way thaat you can do that is by haveing that key that you need and if you coulnd that alarm would go off I saw this question and I tried it and it doesent work

Back in the 80's, Toyota had only so many ways to cut their keys, so they did yes repeat the ways that they cut their keys. There was a story of a woman who was using her daughters car, (Toyota camry, I think) where she used her keys, opened up and drove away in a car that wasn't hers but it was a toyota of the same color, year, and model. That is how I know this. I think that this was with Toyota only, but maybe with some other car brands.

Therefore, old Toyota keys technically aren't universal.